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The thermoluminescent characteristics of synthetic hydroxyl apatite have been examined ; this material being the fundamental inorganic constituant of the enamel of teeth. In vue of trying to obtain an archaeological dating of teeth by TL, a chemical processus of de-proteinisation of the enamel has been adjusted. The predose effects of the grains extracted from human teeth - of an archaeological date between 100 and 6 000 years - have been studied.